Water jacket construction for engines



y 1935- M. s. PARKHILL m- AL. 9 7

WATER JACKET CONSTRUCTION FUR ENGINES Filed 111137.12, 1932 INVENTORS Mortimer ciPami'lull A3 6 al a'gggzfov THEZITA wok/wax Patented May 14, 1935 Mortimer S. Parkhill and Charles W. Taylor, Corning, N. Y., assignors to Ingersoll-Band Company, Jersey City, N. J., a corporation of New Jersey Application July '12, 1932, Serial No. 622,090

- 2 Claims.

This invention relates to a water cooled engine and more particularlyto a form of water jacket construction for internal combustion engines.

It is a fault of some water cooled engines that the water jacket has pockets in which water may be withdrawn from the main circulating current and eventually be converted to steam forming a bubble which is not readily entrained in the'circulating steam and which, by its presence, prevents cooling fluid from coming in contact with parts of the walls of the water jacket. This condition permits some parts of the cylinder wall or head to become very much hotter than other parts which are in contact with the circulating water.

Unequal expansion caused by the temperature \diflerences sets up severe strains in the metal structure. This is particularly noticeable in the cylinder head especially in engines employing overhead valve construction where the inlet and outlet passages conduct a cold explosive charge through one part of the head and hot exhaust gases through another part.

It is an object of this invention to providea water jacket construction for internal combustion engines which will provide for a flow of cooling water throughout every portion' of the water jacket without permitting the formation of steam pockets. Another objectv is to so direct the flow that it will flow from the hotter portions of the cylinder head to the cooler portions thereof so that cold water will cool the hot parts of the cylinder head adjacent the exhaust passage and there become heated'whence it will flow to the cooler parts of the hadadjacent the inlet passage where it will give up some of its heat thereby tending to equalize temperatures in the cylinder head. A further object of the invention is to provide a fluid connection between the, ,cy1inder head water l the invention has been applied,

Figure 2 is a cross sectional view of the cylinder head taken along the line 2--2 of Figure 1 looking in the direction ofthe arrows, and

Figure 3 is a cross section of the cylinder taken along the line 3-3 of Figure 1 looking in the direction of the arrows.

Referring to the drawing a cylinderi is provided with a water jacket 6 which encloses an annular circulating water chamber '1. Within the cylinder a piston 8 is reciprocable in a well "known manner. Closing the cylinder 5 is a cylinder head designated. generally by 9.

Through the cylinder head 9 is an inlet passage H) which is controlled by an inlet valve H operating through a valve guide l2.

Inserted in a suitable bore l8 in the cylinder head 9 is a-removable exhaust valve cage l3- through which extends an exhaust passage l4 controlled by an exhaust valve l5 operating througha valve guide 16. The exhaust valve cage I3 is itself water jacketed and the water passages l'l encircle the exhaust passage M.

The circulating water is first introduced to the valve cage I 3 through an inlet 20 which conducts thecooling water to that part of the water passage II nearest the outlet of the exhaust passage M. The passage 11 is made purposely narrow to cause high velocity flow of the circulating water thereby insuring good cooling efiiciency. The circulating water passes around the valve cage and is then conducted out of the cage through an outlet 2| and by a pipe.22 to an inlet 23 in the cylinder head 9.

The inlet 23 introduces the circulating water to the hottest part of the cylinder head 9, namely, that part which encircles the exhaust passage I4, herein designated as the duct E: As in the valve cage'this portion of the cooling system is restricted to insure 'high velocity of flow of cooling liquid. The water is directed through the narrow channels. E around the exhaust passage M by a bafile 24 which unites the outer wall of the cylinder head 9 and the wall of the bore I8 which encloses the valve cage l3. The water then enters into a relatively large central chamber 25 which is bounded on one side by a baflie 26 which deflects the cooling liquid so that it is forced at high velocity through restricted passage P between the walls of the inlet and exhaust passages and into a second large chamber 21 whence it flows around the inlet passage In through narrow channels I and thence out. of the cylinder head 9 through a water connection C which connects the cylinder head water jacket to the cylinder water jacket.

It will be noted that the cooling water is, forced through a tortuous and labyrinthine path through the cylinder head and compelled to travel at high velocity when passing areas subof the exhaust and inlet passages.

Connected to the water connection C and lo! cated within the circulating water passage 1 of the cylinder 5 is a nozzle-N through which the circulating liquid is forced at high velocity to form an area of low pressure in front of the nozzle N and causing cooling water from behind the nozzle to flow toward the area of low pressure. The nozzle N extends tangentially into the water e I so that the water issues therefrom at an angle to the radii of the cylinder. Thus the entire body of water is caused to whirl in one direction through the water passage I. Eddies in the cooling water are broken up and steam pockets are prevented from forming. An outlet 0 near the base of the water jacket i permits the cooling water tol'eave the system after taking a spiral path through the annular chamber I around the cylinder I. t

Having thus described our invention and shown how the objects hereinbefore referred to have been attained, we do not wish to be limited to the specific structure shown, as it is clear that many modifications may be made without departing from the spirit of the invention.

I claim:

1. In an engine and the like, a water jacketed cylinder, a head therefor having inlet and exhaust es, a connection for introducing cooling water from supply into the head adia-' cent the exhaust passage, there being a passage in the head for conveying all the watersuccessively aroundthe exhaust passageand the inlet c, said e having restricted portions adjacent the inlet and exhaust passages for accelerating the flow of cooling water at these points, and a connection for conveying the water from the vicinity of the inlet passage to the cylinder.

' CHARLES W. TAYIDR.

inlet passage to the uort'rnmn s. PARKHILL. u 

